KR101674435B1

KR101674435B1 - the establishment installation support for poor ground

Info

Publication number: KR101674435B1
Application number: KR1020150085921A
Authority: KR
Inventors: 민용
Original assignee: 민용
Priority date: 2015-06-17
Filing date: 2015-06-17
Publication date: 2016-11-09

Abstract

The present invention relates to a facility installation pillar for a poor ground. A facility installation pillar main body (100) for a poor ground comprises: a tubular pillar (101) in which a steel pipe 100A (4t) is cut to a predetermined length; an anchor bit unit (110) formed in the lower end of the tubular pillar (101) and anchoring a tubular pillar lower reinforcing pipe (108) to an end by integrally welding the tubular pillar lower reinforcing pipe (108) to the outer circumference; a spiral division joint unit (120) of water tank, which is formed at the middle part of the tubular pillar (101) and attached and detached by an assembly bolt (120d) and an assembly nut (120e); a height control socket division joint unit (130) formed at the upper end of the tubular pillar (101) and reinforcing and welding an upper pillar cap (109), wherein the height control socket division joint unit (130) connects and assembles a height adjusting socket (140e) to the upper part of the upper pillar cap (109); and a tubular pillar height adjusting unit (140) formed at the upper end of the height control socket division joint unit (130) and connected by a through bolt (140c), a washer (140d), and the nut (140e). The facility installation pillar for a poor ground enable a facility to be strongly constructed without a complex process such as excavation and a base concrete work in a foundation construction of various facilities such as a solar panel pillar on the poor ground.

Description

The foundation installation for the soft ground is the foundation installation for the poor ground.

The present invention relates to a foundation for installing a soft ground facility, and more particularly, to a foundation for a solar panel and other various facilities in a soft foundation, a facility can be firmly installed without complicated processes such as a trowel and a foundation concrete work. And the like.

As a background of the invention, various supporting facilities such as a solar panel installation, a building facility, and a road facility are usually fixed on the ground in order to firmly fix the ground on the ground. After the foundation concrete is poured, the installation work is carried out on the anchor bolts embedded in the foundation concrete.

The foundation construction is inefficient considering the cost of trowel, mold work, remicon casting, demolition of formwork, and curing period of two weeks, and it takes 10-12% of the total civil works cost for the installation work of these facilities, Is creating problems.

In addition, in the case of laying the support of the facilities in the recent reclaimed land, wetland and water space, when the foundation concrete such as the previous one is laid, the process such as water draining is added and the economical efficiency is lowered and the waterside ecosystem is also affected.

In consideration of this problem, instead of fixing the facility to the foundation concrete, a general file is laid, and an oscillator method of rotating the bit and a rotary method (RCD) are applied. The pulling force is weak in the vertical direction, which leads to a decrease in the economic efficiency due to the extension of the depth of the pier and the operation time of the excavation equipment and the durability of the pillar.

On the other hand, in order to use only a spiral made landlord, the cost of the facility is excessively enforced and the economic efficiency due to the operation of the civil engineering equipment is accompanied.

As a reference, according to the related art according to Korean Patent No. 10-1190695, there is a technique of fixing a solar panel by using a screw anchor pillar having a predetermined length without pouring a foundation concrete. The screw anchor pillar is rotated, There is a problem that the installation depth is not constant depending on the stratum condition of the site due to the inconveniences such as cutting the upper end of the column and welding the foundation plate again.

As an alternative to this, a method of installing the screw anchors as described above is also disclosed. However, the used anchors or the anchors installed at the lower ends of the columns are not durable enough to cast gravel or rock layers for economical reasons.

Meanwhile, according to the related art according to Korean Registered Utility Model No. 20-0443819, a supporting structure for installing various facilities is composed of a wedge portion of an upper beam-lowered joint having a threaded outer periphery and a supporting portion at the upper end, In the case of soft ground with rock layer, there is a problem that the outer edge of the upper beam is made of thread and the wedge part of the upper beam structure causes the pulling force to fall, In the case of pouring the upper end, since the column fitting portion is broken, the installation depth becomes unstable, so that a part of the column is cut off, and a troublesome process of welding the column fitting portion again is accompanied.

In addition, the multipurpose mounting fixture according to the Japanese Laid-Open Utility Model Publication No. 20-2015-0000189 includes a tubular body configured to be inserted deeply into the strut, a nut forming a screw at the outer tubular periphery, and a nut for fixing the strut at the upper end of the tubular body, The lower end of the tube body is formed by a drill part formed by twisting a steel piece having a diameter smaller than the tube diameter.

In the above-described method, it is possible to install the tubular body in a pure soft ground by rotating the tubular body. However, when the soil layer is laid in a layer having gravel or rock in the bottom layer, the upper end of the tubular body is damaged. Of course, It can be seen that it is not an appropriate means.

[Document 1] KR 10-1190695 (B1) 2012.10.08 [Document 2] KR 20-0443819 (Y1) 2009.03.09 [Document 3] KR 20-2015-0000189 (U) 2015.01.14

The present invention provides an installation support for a soft ground that can firmly install a facility without complicated processes such as a trencher and a foundation concrete work in the foundation work of various facilities including a solar panel support in soft ground , It is possible to solve the problem pointed out as a problem related to the installation land of the conventional soft ground as described above, to enhance the durability while improving the economical efficiency, and in particular, to support the gravel or rock bed To be provided.

On the other hand, for the purpose of strengthening the pulling force in the soft ground, the spiral installation standard and the quantity of the spiral installation on the outer circumference of the column are adjusted to prevent the spiral from being installed in the pipe support more than necessary beforehand, Especially, the reinforcement core material to supplement the durability of the general piping pipe and the anchor bit structure of the special steel material which enables the pulling force in the soft ground and the casting in the gravel or the rock layer, The present invention aims to provide an installation support for a soft ground having a high economic efficiency and a use effect by providing an installation support for a soft ground,

In order to achieve the above object, the present invention provides a pipe support structure for a pipe, comprising: a pipe support 101 having a pipe length 100A (4t) cut to a predetermined length; and a lower end of the pipe support 101, Anchor bit portion 110 which is integrally welded and fixed to the distal end portion; The middle part of the tubular support 101 includes a spiral split joint part 120 of a water tank to be detached by the assembly bolt 120d and the assembly nut 120e; The upper end of the tubular support 101 has a height adjustment socket split joint 130 for reinforcing the upper support cap 109 and connecting the height adjustment socket 140f to the upper support cap 109; The upper portion of the height adjustment socket split joint part 130 includes a tube support height adjustment part 140 which is fastened with a through bolt 140c, a washer 140d and a nut 140e. The present invention provides an installation pillar main body 100 for providing soft ground foundation facilities for soft ground such as a solar panel support and a soft ground foundation which can firmly install facilities without complicated processes such as terracing and foundation concrete works. And relates to an installation stand.

The installation main body 100 for installing soft ground facilities according to the present invention can be used for basic construction of various facilities such as a solar panel support, Since a selected one of the spiral split joints 120 made of the small diameter portion and the large diameter portion at a predetermined interval is selected and installed in the field by the assembly bolt 120d and the assembly nut 120e, It is possible to increase the pulling force of the support 101 and to prevent the spiral from being formed in the tube support more than necessary beforehand, thereby reducing the manufacturing cost and improving the economical efficiency.

In the case where the main body 100 is not paved to a predetermined depth, the height adjustment socket 140f and the height adjustment slots 140b 'provided in the base plate lower socket 140b are formed in several lengths, And the assembly bolt slot 140a 'provided in the base plate 140a provided in the tube support height adjustment part 140 is disposed at a lower portion of the solar panel support 200b It is convenient to move the assembly bolts provided in the provided solar panel support base plate 200c to adjust the installation position, thereby reducing air and site labor costs.

On the other hand, it solves the problem pointed out as a problem concerning the installation land for the existing soft ground, and enhances the durability while improving the economic efficiency.

Particularly, the concrete is disposed in the vicinity of the upper end of the tubular support pillar so that the upper end of the tubular support column 101 is exposed to the ground, so that the ready-mix concrete can be fixed to the tubular upper truncated concretes 20 The concrete ready to be fixed to the upper end of the tubular support 101 and to be filled from the lower end of the tubular support 101 is formed in a state in which the reinforcing bars 104 disposed in the tubular support 101 are embedded, A space between the reinforcing bars 104 protruding into the reinforcing core upper cap 108 in the cap 109; The ready-mix concrete that has been discharged to the hollow portion of the reinforcing core member 150 reaching the lower end of the tube support column 101 is fixed to reinforce the durability of the tube support 101 with the concrete 40 in the tube support post, The ready-made concrete leaking to the lower side of the anchor bit portion 110 is fixed and acts as the tube supporting end anchor concrete 30, thereby providing an effect of greatly enhancing the pulling force at the soft ground.

In addition, the specification and quantity of the spiral installation can be adjusted in the field on the outer periphery of the columnar tube, thereby preventing the spiral from being installed and installed more than necessary.

In addition, it provides anchored bit structure of special steel material which can be installed in gravel or rock layer and anchor bit of special steel material that enables concrete to be poured into the underground deep part. It is a useful invention that provides a highly effective effect.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of an installation main body of a facility for soft ground according to the present invention
Fig. 2 is an exploded perspective view of Fig.
3 is an exploded perspective view of the main part of the tubular support reinforcing core material and the anchor bit according to the present invention.
Figure 4 is a top perspective view of an anchor bit according to the present invention,
Fig. 5 is a perspective view of the bottom view in Fig.
Fig. 6 is a longitudinal sectional view showing the internal configuration of Fig. 4
FIG. 7 is a cross-sectional view showing the installation state of the installation main body of the facility for soft ground according to the present invention
Fig. 8 is a view showing the state of use of the facility for installing soft ground for a ground according to the present invention
FIG. 9 is an exploded perspective view of a tubular pillar height adjustment portion of a pillar for installation of soft ground according to the present invention
Fig. 10 is an exploded perspective view of the spiral split joint according to the present invention. Fig. 10 is an exploded perspective view of the spiral split joint according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is an entire perspective view of a support main body for a soft ground according to the present invention, FIG. 2 is an exploded perspective view of FIG. 1,

Installment of Facility for Soft Ground The pillar main body 100 comprises: a tubular support 101 having a tubular steel pipe 100A (4t) cut to a predetermined length;

The lower end of the tubular support 101 includes an anchor bit 110 for integrally welding the tubular support lower reinforcement pipe 108 to the outer diameter portion and fixing the tubular support lower reinforcement pipe 108 to the distal end portion. The middle part of the tubular support 101 includes a spiral split joint part 120 of a water tank to be detached by the assembly bolt 120d and the assembly nut 120e;

The upper end of the tubular support 101 has a height adjustment socket split joint 130 for reinforcing the upper support cap 109 and connecting the height adjustment socket 140f to the upper support cap 109;

The upper portion of the height adjusting socket split joint 130 includes a tube support height adjusting unit 140 which is fastened with a through bolt 140c, a washer 140d and a nut 140e.

The detailed constituent means of the installation main body 100 for a soft ground facility having the above-described constituent means will be described in detail with reference to the accompanying drawings.

1 and 2 attached to the present invention, and FIG. 3 which is a perspective view of a main part of the present invention, which is a disassembled and assembled perspective view of a tubular support reinforcement core part and an anchor bit, 104), a hollow portion 85ø having a reinforcing groove formed on its rim, a spacing plate 105 having a diameter of 95.4ø and a thickness of 2t; A reinforcing core member 150 in which a reinforcing core center holding plate 106 in which a reinforcing through hole is formed on a circular plate of a hollow portion 85ø, a diameter 106ø and a thickness of 2t, A tip end of a ready-made concrete injection pipe 103 protruding from a concrete injection nipple 102 protruding from a bottom outer edge portion of the height-adjustable socket split joint 130 protrudes from the reinforced concrete injection nipple 103, A Y tube 103 'is attached to a distal end portion protruding to the lowermost end of the tubular strut 101 via a gap holding plate 105 provided in the core material portion 150 and a hollow portion of the reinforcing core material center holding plate 106, 101) is placed on the bottom plate 107 of the reinforcing core material welded to the lowermost end.

The reinforcing core lower plate 107 is formed with four holes through which the reinforcing bar 104 of the reinforcing core portion 150 passes and two holes adjacent to the Y pipe 103 ' A tubular support lower reinforcement pipe 108 is welded over the reinforcement core lower plate 107 to form an anchor bit portion 110 which will be described later. As shown in FIG.

The anchor bit portion 110 which is integrally fixed to the outer diameter portion of the tube supporting lower reinforcing tube 108 at the lower end of the tube supporting member 101 is formed by the upper surface of the main anchor bit according to the present invention 4 which is an urban perspective view, FIG. 5 which is an upper perspective view perspective view of the main part of the anchor bit according to the present invention, and FIG. 6 which is a perspective view of the bottom view of FIG.

The anchor bit unit 110 includes an anchor bit blade 110a formed by vertically cutting four hemispherical corners vertically and having an anchor bit step 110b formed on an upper edge thereof; An anchor bit groove 110e which is a space cut between the anchor bit blades 110a; Anchor bit reinforcing bar 110c drilled vertically on the upper surface of each of the anchor bit blades 110a; An anchor bit mineral water channel 110d having a cruciform groove formed at a predetermined depth between the anchor bit iron core 110c and a hemispherical land symmetrical to the anchor bit mineral water channel 110d, And the anchor bit cross-hair 110f are integrally formed.

The anchor bit portion 110 is provided as a casting of a special steel material having a strength capable of crushing the gravel and the rock layer so that the lower end of the tubular strut 101 to which the tubular strut lower reinforcement pipe 108 is reinforced and fixed, (110) hemispherical portion

The spiral split joint part 120 for detaching the assembly bolt 120d and the assembly nut 120e in the middle part of the tube support 101 is formed by spirally splicing the spiral 120b to form a pair of spiral split joints (120a); And a spiral lateral mounting flange 120c fixed to both ends of the spiral split joint 120a.

10 is a view showing a state of use of a spiral split joint according to the present invention, in which a small diameter spiral split joint is fastened, and FIG. 10 is an example of tightening a large diameter spiral split joint.

As shown in FIG. 10, a selected one of the spiral split joints 120, which is composed of the inner part of the tubular pillars 101 in which the facility is to be installed, or the spiral split joints 120 made of small and large diameters at regular intervals, Since the bolts 120d and the assembly nut 120e are desorbed in the field, it is possible to increase the pulling force of the tube support 101 and prevent the spiral from being formed in the tube support more than necessary beforehand, .

Next, as shown in an exploded perspective view of the tubular column height adjusting portion of the installation for a soft ground according to the present invention, a height adjusting socket 140f is mounted on the upper end of the tubular supporting column 101 according to the present invention, The tubular-post support height adjusting unit 140 for connecting and assembling the tubular post 130 is constructed as follows.

The tubular post height adjusting part 140 is a tubular body fitted to the height adjusting socket 140f and includes a base plate lower socket 140b having two height adjusting slots 140b ' The base plate 140a, on which a plurality of assembly bolt holes 140a 'are formed, is integrally formed on the base plate fixed on the base plate lower socket 140b.

The tubular support height adjusting portion 140 fastened with the through bolt 140c and the washer 140d and the nut 140e is attached to the base plate 140b through the height adjusting elongated hole 140b 'formed in the base plate lower socket 140b. The through bolt 140c is inserted through the through bolt hole 140f 'of the height adjusting socket 140f fitted to the plate lower socket 140b and then is tightly attached to the washer 140d and the nut 140e, So that the height of the plate lower socket 140b can be adjusted by the clearance distance of the height adjusting slot 140b '.

With reference to FIG. 8, which is a state of use of the installation support main body for a soft ground installation according to the present invention, the operation of the tubular support height adjuster 140 will be described in further detail below.

Since the solar panel part 200 including the angle adjusting hinge 200a on the solar panel support 200b installed and assembled on the ground at a predetermined height is collectively assembled and produced in a certain standard at the time of manufacture, 200b are collectively the same in size.

Therefore, the installation depth and the installation position are different from the originally designed values according to the geological condition of the site, and thus, the effort and cost of the construction cost have been considerable in setting the height and assembly position of the solar panel support 200b.

For this purpose, even when the main body 100, which is a pillar for installing soft ground facilities according to the present invention, is not paved to a certain depth, the height adjustment socket 140f and the height adjustment slots 140b provided in the base plate lower socket 140b 140b 'so that the depth of the tubular support 101 can be adjusted immediately in the field.

The adjustment of the placement position of the tube support 101 can be performed by adjusting the assembly bolt hole 140a 'provided in the base plate 140a provided in the tube support height adjuster 140 to the position of the solar panel support The assembly bolts provided on the solar panel support base plate 200c provided at the lower portion of the support frame 200b are moved and installed.

The process for installing the soft ground support 100 using the soft ground support facility 100 according to the present invention will be described with reference to FIG.

The main body 100 for installing soft ground facilities according to the present invention includes a reinforcing core member 101 fixed integrally with the lower end of the tubular support 101 under the tubular support lower reinforcement pipe 108 reinforced and fixed at the lower end of the tubular support 101, The lower plate 107 and the anchor bit 110 are integrally fixed and the anchor bit 110 is formed in the anchor bit portion 110 in the inner diameter of the tube support 101, The reinforcing core material upper cap 108 is inserted into the reinforcing bar 104 protruding from the upper end of the tube support 101 in a state where the reinforcing bars 104 disposed in the reinforcing bar 150 are embedded, Is installed at the distal end of the ready-made filler pipe 103 which is inserted through the hollow portion of the reinforcing core member 150 reaching the lower end of the tube support 101 through the ready-made filler tube nipple 102 protruded from one side of the upper end of the tube support 101 A Y tube 103 'is formed on an upper surface of the anchor bit portion 110, There are formed four holes through which the reinforcing bars 104 of the base reinforcement core member 150 pass and two holes adjacent to the ready-mix injecting pipe 103 and four holes through which the reinforcing bars 104 pass, It is supplied on-site in the state of study.

The main body 100, which is a foundation for installing soft ground facilities installed in the above-described state, is constructed by placing a tubular support 101 with an oscillator method for rotating an anti-clock or a bit, and an RCD method , The periphery of the upper end of the tube support pierced is partially erected so that the concrete is injected into the concrete using the concrete injection cone 103 "in a state that the concrete injection pipe nipple 102 is exposed on the ground.

The ready-mix concrete is inserted into the reinforcing core lower plate 107 fixed integrally with the lower end of the tube support 101 through the ready-mix injecting tube 103 in the tube support 101 and the ready- The reinforcing core member 150 formed on the reinforcing core lower plate 107 fixed on the upper plate of the anchor bit unit 110 through the Y tube 103 'of the reinforcing core member 103 penetrates through the reinforcing core member 104, Holes; The ready-mix concrete is discharged through the concrete hole formed between the two holes adjacent to the Y tube 103 'and the four holes through which the reinforcing bars 104 are passed, Is integrally fixed to the anchor bit portion 110 by the tubular support end anchor concrete (30).

The ready-mix filled from the lower end of the tubular support 101 is inserted into the reinforced core upper cap 110 in the upper strut cap 109 at the upper end of the tubular support 101 in a state in which the reinforcing bars 104, A space between the reinforcing bars 104 protruding into the reinforcing member 108; The ready-mix concrete that has been discharged to the hollow portion of the reinforcing core member 150 reaching the lower end of the pipe supporting column 101 is fixed to reinforce the durability of the pipe supporting column 101 by the concrete 40 in the pipe supporting column.

The upper end of the tubular support 101 is fixed to the periphery of the upper end of the tubular support while the upper end of the tubular support 101 is exposed to the ground and the upper end of the tubular support 101 is firmly fixed .

The tubular strut 101 for installation of various facilities in the soft ground may be provided with a spiral split joint portion 120 at an intermediate portion of the tubular struts 101 at an arbitrary interval So that the pulling force of the tube support 101 is doubled.

100: Body 101:
102: Remicon Injection Pipe Nipple 103: Remicon Injection Pipe
103 ': Y tube 103'': Racon injection cone
104: Rebar
105: space-maintaining plate 106: reinforcing core material center plate
107: reinforcing core material lower plate 108: tube supporting lower reinforcing tube
109: Upper holding cap
110: anchor bit unit 110a: anchor bit blade
110b: anchor bit step 110c: anchor bit steel rod
110d: Anchor bit remicon E Euro 110e: Anchor bit groove
110f: Anchor bit, crossed edge
120: Spiral split cube
120a: spiral split piece 120b: spiral
120c: Spiral side mounting flange
120d, 130d, assembly bolts 120e, 130e, 140e,
130: height adjustment socket split joint part
130a: height adjustment socket split joint
130b: Split joint lower assembling flange
130c: Split joint Lateral assembling flange
140: tube holding Height adjusting portion
140a: Base plate 140a ': Assembly bolt slot
140b ': height-adjustable slot 140c: through bolt
140d: Washer 140f: Height adjustment socket
140f ': Through bolt hole
150: reinforcing core member

Claims

The soft ground installation facility installation main body 100 includes
A tubular support 101 cut into a predetermined length of the pipe 100A (4t);
The lower end of the tubular support 101 includes an anchor bit 110 for integrally welding the tubular support lower reinforcement pipe 108 to the outer diameter portion and fixing the tubular support lower reinforcement pipe 108 to the distal end portion.
The middle part of the tubular support 101 includes a spiral split joint part 120 of a water tank to be detached by the assembly bolt 120d and the assembly nut 120e;
The upper end of the tubular support 101 has a height adjustment socket split joint 130 for reinforcing the upper support cap 109 and connecting the height adjustment socket 140f to the upper support cap 109;
The upper portion of the height adjustment socket split joint part 130 includes a tube support height adjustment part 140 which is fastened with a through bolt 140c, a washer 140d and a nut 140e. Installation holding.

The tubular support (101) according to claim 1, wherein the tubular strut (101) is an internal reinforcing core comprising a hollow portion (85ø) having reinforcing ribs formed on the rim (104) and; A reinforcing core member 150 in which a reinforcing core center holding plate 106 in which a reinforcing through hole is formed on a circular plate of a hollow portion 85ø, a diameter 106ø and a thickness of 2t, A tip end of a ready-made concrete injection pipe 103 protruding from a concrete injection nipple 102 protruding from a bottom outer edge portion of the height-adjustable socket split joint 130 protrudes from the reinforced concrete injection nipple 103, A Y tube 103 'is attached to a distal end portion protruding to the lowermost end of the tubular strut 101 via a gap holding plate 105 provided in the core material portion 150 and a hollow portion of the reinforcing core material center holding plate 106, 101) is located at the bottom plate (107) of reinforcing core material welded at the lowermost end.

The reinforcing core member bottom plate 107 according to claim 2, wherein the reinforcing core member lower plate 107 is formed by four holes through which the reinforcing bars 104 of the reinforcing core member 150 pass, and two holes adjacent to the Y pipe 103 ' A hole is formed in the anchor bit 108 and a hole having a predetermined size is formed between the four holes through which the reinforcement 104 penetrates. The tube support lower reinforcement pipe 108 is welded onto the reinforcement core lower plate 107, (110). &Lt; IMAGE >

The anchor bit unit according to claim 1, wherein the anchor bit unit (110) comprises: an anchor bit blade (110a) formed by vertically cutting four corners of the hemispherical surface and having an anchor bit step (110b) formed on an upper edge thereof; An anchor bit groove 110e which is a space cut between the anchor bit blades 110a; Anchor bit reinforcing bar 110c drilled vertically on the upper surface of each of the anchor bit blades 110a; An anchor bit mineral water channel 110d having a cruciform groove formed at a predetermined depth between the anchor bit iron core 110c and a hemispherical land symmetrical to the anchor bit mineral water channel 110d, And an anchor bit cross blade (110f) are integrally formed.

The spiral split joint part (120) according to claim 1, wherein the spiral split joint part (120) comprises: a spiral split joint (120a) having a pair of spirals (120b) mutually symmetrically welded; And a spiral lateral mounting flange (120c) fixed to both ends of the spiral split joint (120a).

The apparatus according to claim 1, wherein the tube post height adjustment part (140) is a tube body fitted to the height adjustment socket (140f), and includes a base plate lower socket (140b) having two height- and; Wherein a base plate (140a), on which a plurality of assembly bolt holes (140a ') are formed, is integrally formed on a circular plate fixed on the base plate lower socket (140b).

The apparatus of claim 1, wherein the tubular post-height adjuster (140) comprises a height adjustment socket (140f) formed in the base plate lower socket (140b) The bolt hole 140f 'is inserted through the through bolt 140c and then the washer 140d and the nut 140e are tightened and further welded together so that the height of the base plate lower socket 140b is adjusted to the height adjusting hole 140b' ) Of the installation site for soft ground.